Dairy

Product Quality

Find comprehensive resources and advice on dairy production, milk quality, processing, and standards. Learn the best milking practices, cow milk assessment, as well as dairy health and nutrition facts. Make the most out of this dairy producers’ knowledge hub on increasing cows’ milk production.

Dairy Production

A major factor in the volatility of the dairy industry is the fact that the quantity and quality of milk produced over time cannot be guaranteed. Advice on best milking practices and frequency can help dairy farmers improve the quality of their products and increase profit. Learn how to best monitor and control factors such as cow health, nutrition, and milking procedures.

Cows must be in excellent health to provide high-quality milk, and Penn State Extension provides comprehensive resources on the topic of dairy herd health. An efficient level of milk production will ensure that your dairy cattle are comfortable and promote udder health. At the same time, cows with healthy udders generally produce the desired volume of high-quality milk. Indicators such as high somatic cell counts (SCC) or high total bacteria count (TBC) simultaneously affect cattle health and milk quality standards. For additional information, look up our Dairy Cow Health and Diseases resources section.

High-quality milk comes from managing health and nutrition in your herd. Find resources on feed management, fat supplementation, and more. We also encourage you to explore the Dairy Cow Nutrition and Feeding resources for a deep-dive into nutritional and feeding factors that can impact your milk production strategy.

Milk Quality, Pasteurization, and Raw Milk

Whether you are using a pasteurization process, supply your milk to a third-party processor, or sell raw milk, you can get up-to-date advice on all the processes involved in preserving milk’s freshness, flavor, and quality.

Milk component levels are important factors in herd management – not only are they indicators of cow health and nutrition, but they can also directly impact dairy farm income. Browse our resources for more information on milk components and strategies to improve component production.

A solid understanding of the pasteurization process and milk sanitation requirements is necessary for the production of both saleable and waste milk. Operators can learn the steps of pasteurization as well as sterilization measures for associated equipment.

Dairy Standards and Regulation

For successful dairy farm management, you can access Penn State Extension resources on dairy product standards and regulations. Information on Grade "A" pasteurized Milk Ordinance, Food Safety Modernization Act (FSMA) compliance, and USDA Dairy Product Grades and Standards is available and regularly updated.

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  1. Dairy Biosecurity Plan Development for Bovine Influenza A (HPAI)
    Webinars

    Free

    Dairy Biosecurity Plan Development for Bovine Influenza A (HPAI)
    When Watch Now
    Length 1 hour
    Recorded Apr 24, 2024
    Event Format On-Demand | Recorded
    Craft your dairy farm's biosecurity plan with PA guidelines to combat Bovine Influenza A. Join our webinar for expert guidance.
  2. Figure 1. Conversion of glucose to acetate. Source: "Digestion: The Fermentative Processes"
    Articles
    Ionophores: A Technology to Improve Cattle Efficiency
    By Tara L. Felix
    This article explains how the use of ionophores—antibiotics that shift ruminal fermentation patterns—can improve cattle production efficiency.
  3. Dairy Biosecurity Plan Development for Bovine Influenza A (HPAI)
    Workshops

    Dairy Biosecurity Plan Development for Bovine Influenza A (HPAI)
    Length 1 hour, 30 minutes
    Craft your dairy farm's biosecurity plan with PA guidelines to combat Bovine Influenza A. Join our open-house event for expert guidance.
  4. Cows in a milking parlor
    Articles
    Seconds Do Matter in Your Milking Routine
    By Cassie Yost
    There are many factors that can affect a farm's milking routine. But something to keep in mind is that seconds matter in your routine.
  5. Stacks of petri dishes; Photo Credit Haley Springer
    Articles
    Feasibility of an On-farm Laboratory
    By Ginger D Fenton, PhD
    Setting up a laboratory to assess raw milk quality and finished dairy products on the farm is an undertaking that can require additional equipment and technical knowledge.
  6. Connecting Milk Quality with Udder and Animal Health
    Webinars

    Free

    Connecting Milk Quality with Udder and Animal Health
    When Watch Now
    Length 1 hour
    Recorded Aug 1, 2023
    Event Format On-Demand | Recorded
    Join this free informative webinar and learn how the quality of milk is affected by animal and udder health and indicators to track, including somatic cell count.
  7. Nutrition may help prevent mastitis
    Articles
    Nutrition, Immunity and Mastitis
    By Robert J. Van Saun, DVM, MS, PhD
    The role of nutrition in mastitis prevention is reviewed relative to its impact on immune response of dairy cows
  8. Feed and Milk Quality: Is There a Connection?
    Webinars

    Free

    Feed and Milk Quality: Is There a Connection?
    When Watch Now
    Length 1 hour
    Recorded Jul 11, 2023
    Event Format On-Demand | Recorded
    During this free webinar, learn how the diet of your dairy cows can affect the production of quality milk.
  9. Turbulent Times: Taking Care of Milk Once It's Left the Udder
    Webinars

    Free

    Turbulent Times: Taking Care of Milk Once It's Left the Udder
    When Watch Now
    Length 1 hour
    Recorded Jun 20, 2023
    Event Format On-Demand | Recorded
    During this informative webinar, learn how to minimize damaged or mishandled dairy milk and ensure the highest quality products are distributed to consumers!
  10. Photo Credit Ginger Fenton, Penn State Extension
    Articles
    Foodborne Pathogens Can Lurk Around the Farm Environment
    By Ginger D Fenton, PhD
    The possible presence of foodborne pathogens is a concern to all dairy producers, farms that have value-added dairy businesses should be extremely vigilant.
  11. Troubleshooting Problems with Low Milk Fat and Milk Protein
    Articles
    Troubleshooting Problems with Low Milk Fat and Milk Protein
    By Virginia A. Ishler, Rainey Rosemond
    This informative article covers the importance of monitoring the milk components of a herd and how it can assist in identifying the health and nutritional status of lactating cows.
  12. Photo credit Carly Becker, Penn State Extension
    Articles
    What is a Milking Evaluation and How Can it Help Improve Milk Quality?
    By Carly Becker
    The Penn State Extension Dairy Team offers milking evaluations to help dairy producers improve their milk quality and identify issues that could be contributing to an increased Somatic Cell Count (SCC).
  13. The Strip Yield Test
    Videos
    The Strip Yield Test
    By Amber Yutzy
    Length 4:32
    In this video, you will learn about an easy test that can be performed on your farm to test if overmilking is occurring. With these results, you can monitor unit removal as well as adjust unit take-off to reduce stress on teat ends.
  14. Implants used in cattle increase feed efficiency. (Photo Credit: PA Beef Producers Working Group)
    Articles
    2017 Calf-fed Holstein Demonstration Results
    By Tara L. Felix
    This report summarizes the calf-fed holstein demonstration comparing growth performance and economic data of implanted and non-implanted cattle by the PA Beef producers working group in 2017.
  15. Economics of Supplemental Feeding with Pasture-Based Systems
    Articles
    Economics of Supplemental Feeding with Pasture-Based Systems
    Consider milk and feed prices, substitution rates, and expected yield and component responses when deciding how much supplemental feed to offer.
  16. Photo Credit Penn State Extension
    Articles
    Proper Milking Procedures
    By Greg Strait
    Proper milking procedures begin when animals are being brought into the stall, whether that means an individual stall or a parlor "stall."
  17. Photo Credit Penn State Extension
    Articles
    Wearing Gloves on a Dairy Farm
    By Amber Yutzy, Ginger D Fenton, PhD
    Wearing gloves is a very simple management practice that could help to reduce milk quality issues and limit spreading of contagious and environmental bacteria between quarters and cows.
  18. Heifer Mastitis: Prevention is the Key!
    Articles
    Heifer Mastitis: Prevention is the Key!
    By Amber Yutzy
    Prevention of mastitis requires reducing exposure to mastitis pathogens and enhancing the ability of the heifers' immune system to respond.
  19. California Mastitis Testing for Dairy Cows
    Videos
    California Mastitis Testing for Dairy Cows
    By Amber Yutzy
    Length 6:29
    In this video, you will learn how to perform a simple mastitis test called the California Mastitis Test. This test will help to decrease mastitis on your farm.
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